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Oil well Christmas tree. In petroleum and natural gas extraction, a Christmas tree, or tree, is an assembly of valves, casing spools, and fittings used to regulate the flow of pipes in an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well, and other types of well.
Christmas tree decorated with lights, stars, and glass balls Glade jul by Viggo Johansen (1891), showing a Danish family's Christmas tree North American family decorating Christmas tree (c. 1970s) A Christmas tree is a decorated tree, usually an evergreen conifer, such as a spruce, pine or fir, associated with the celebration of Christmas. [1]
By analyzing those differences, Christmas tree packets can be used as a method of TCP/IP stack fingerprinting, exposing the underlying nature of a TCP/IP stack by sending the packets and then awaiting and analyzing the responses. When used as part of scanning a system, the TCP header of a Christmas tree packet has the flags FIN, URG and PSH set ...
Items such as the Chrismon/Christmas tree and Advent wreath are placed in the church during the hanging of the greens ceremony. The hanging of the greens is a Western Christian ceremony in which many congregations and people adorn their churches, as well as other buildings (such as a YWCA or university), with Advent and Christmas decorations.
Hustle connected with eight Christmas tree farms in five different states and surveyed them to discover that, on average, they sell 6- to 7-foot trees cut, baled, and loaded, for $35 each. After ...
Modern drag races are started electronically by a system known as a Christmas tree. A common Christmas tree consists of a column of seven lights for each driver or lane. Each side of the column of lights is the same. At an NHRA national event, the Christmas Tree, which was first used in April 2011, from the top down, consists of a blue LED ...
A pre-lit tree is an artificial Christmas tree which is pre-wired with Christmas lights. The lights are wrapped around the tree before it is sold, reducing set up time and making storage simpler. The lights cannot usually be removed from the tree because they are normally embedded within the artificial branches.
The National Christmas Tree is a large evergreen tree located in the northeast quadrant of the Ellipse near the White House in Washington, D.C. Each year since 1923, the tree has been decorated as a Christmas tree. Every year, early in December, the tree is traditionally lit by the President and First Lady of the United States.